Glass-grooving machine.



No. 792,685. PATENTBD JUNEQ'O, 1905. A. WERTZLBR.

GLASS GROOVING MACHINE.

APPLIUATION FILED DB0. 8,1904.

2 SHEETS-SHEET 1.

@fing-Urea No. 792,685. PATENTED JUNE 20, 1905. A. WERTZLER.

GLASS GROOVING MACHINE.

AIPLIOATION FILED DEG. 8,1904.

2 SHEETS-SHEET 2.

Patented J une 20, 1905.

PATENT Trice.

ALFRED WERTZLER, OF CHICAGO, ILLINOIS.

GLASS-GROOVING IVIACHINE.

SPECIFICATION forming partof Letters Patent No. 792,685, dated June 20, 1905. Application filed December 8, 1904. Serial No. 235,984.

To @ZZ whom, t may concern.-

Bc it known that I, ALFRED WERTZLER, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Glass-Grooving Machines, of which the following is a full, clear, and exact description.

Heretofore the cutting of straight grooves in plate-glass used for shelves in china and bric-a-brac closets and for costly glassware has been done-mostly by hand, especially in small shops. This is comparatively expensive and slow, involving as it does the marking of the glass to indicate the course of the groove and then the application of the glass to the corundum wheel by the operator, whose eyes and hands must be trained to obtain the proper direction and get the proper depth to the groove and at the same time avoid the heating of the glass to such an extent as to cause the crystallization and breaking thereof. The devices heretofore used to perform this grooving have generally been too expensive for a small dealer to instal in his workshop, besides being heavy and cumbersome and occupying considerable space.

The object of my invention isto provide a light, cheap, and simple machine which will practically enable the workman to control the pressure of the glass against the grindingwheel and at the same time eliminate almost entirely the necessity for the expertness required by the old process and at the same time do the grooving so satisfactorily and rapidly as to reduce the cost of the same to such an extent as to make the use of such a product available for many arts from which, considering the expense, it was excluded. This I accomplish by the means hereinafter fully described, and as particularly pointed out in the claims.

In the drawings, Figure 1 is a side elevation of my invention. Fig. 2 is a plan view of the same. Fig. 3 is a transverse section of the upper part of the machine, taken on dotted line 3 3, Fig. Q. Fig. Liis aplan view of the under side of the reciprocal carrier or truck. Fig. is a detail view showing the under side 0f one of the ball-bearing runners of said carrier or truck.

Referring to the drawings, A represents the supporting-frame of my improved machine, which comprises several pairs of legs, each of which are connected at or near their upper ends by suitable cross-bars and secured in their relative positions to each other by suitable top rails, to which the legs are braced, as shown, to give the structure rigidity. The bed of the machine is preferably composed of four longitudinally arranged and parallel corresponding timbers d (t, which are mounted upon and secured to the cross-bars that connect the legs. About midway the length of the machine a short transverse shaft B is journaled in bearings b supported on and secured to two of said timbers a next one side of the machine, and between said timbers said shaft is provided with a fast and a loose pulley c and CZ, which are engaged in the usual manner and derive motion from a drive-pulley C on the drive-shaft D, journaled at one end of the machine, through the medium of a suitable belt E. One end of shaft B terminates between the two central timbers and has a corundum or other suitable grinding-wheel G, the circumferential cutting edge of which is shaped to correspond to the shape it is desired to give the groove that it is intended to make in glass, as will hereinafter be more fully explained.

The ends of the two timbersopposite those on which shaft B is journaled are connected by a suitable cross-piece e, and hinged at one end to said cross-piece is a longitudinally-disposed skid H, which corresponds in length to the bed of the machine and has angle-iron rails ff secured to and upon the parallel side frames thereof. The end of the skid opposite its hinge is preferably sustained by a vertically-disposed screw I, which is tapped up through a suitable cross-piece connecting the bed-timbers a and has a suitable hand-'wheel on its lower end for manipulating it.

Mounted upon and adapted to be moved back and forth on the rails between the ends of the skid is a carrier J. This carrier comprises a rectangular frame consisting of two parallel side sills, end sills connecting the same, and cross-pieces also connecting said side sills, preferably at equal distances apart.

Secured to the under side of the side sills of the carrier near each end are ball-bearing runners /i 7L, each of which comprises a receptacle for the balls which is shaped like a peapod, with the lips of the sections thereof separated slightly to permit the tread of the rails f to enter between them and said balls to rest and roll thereon when the carrier is properly mounted on the skid and moved by the workman back and forth on said rails. The top of this carrier is composed of and covered by aY suitable cover K, of canton-flannel or felt or other suitable fabric, and when in use this cover is wet and one or more suitable gageblocks r are used to assist in retaining the glass in proper position on the carrier.

The operation of my improved machine is as follows: The grinding-wheel being set in motion by properly shifting the belt and the plate of glass placed and properly adjusted on the carrier, so that the surface thereof in which the groove is to be cut will overhang the side thereof next the grinding-wheel to such an extent that the said wheel will come in contact with its under side, the carrier is moved back and forth past the grindingwheel. Before this is done, however, the end of the skid supported by the screw is adjusted vertically, so that the grinding-stone will cut into the glass as the carrier moves past or so that by the exertion of sufficient downward pressure on the carrier as it moves past the wheel the latter will cut into the glass. When the downward pressure is thus exerted on the carrier, the skid (whose side pieces are made of comparatively light timber) yields and allows the glass to come in contact with the grinding-wheel at times when if the downward pressure was removed from the carrier and the latter was moved back and forth the glass would move over it. This enables the operator when he observes the glass is getting too heated to relieve the pressure thereof on the grinding-wheel and avoid crystallizing and breaking the glass. By wetting' the top of the cover of the carrier the glass adheres to the same and does not slip from side to side during the grooving operation.

What I claim as new is- 1. In a plate-glass-grooving machine, the combination with a suitable su pporting-frame, a transverse shaft mediate its ends one end of which terminates between the sides thereof, and a grinding-wheel secured thereto, of a reciprocating carrier movable longitudinally on that side of the supporting-frame opposite said shaft; a skid adjustable at one end upon which said carrier moves; and ball-bearings interposed between said carrier and skid.

2. In a plate-glass-grooving machine the combination with a suitable supporting-frame, a transverse shaft mediate its ends one end of which terminates between the sides thereof, and a grinding-wheel secured thereto, of a reciprocating yielding carrier movable longitudinally on that side of the supporting-frame opposite said shaft; a skid adjustable at one end upon which said carrier moves; and ballbleaings interposed between said carrier and s 1 3. In a plate-glass-grooving machine, the combination with a suitable supporting-frame, atransverse shaft one end of which terminates between the sides of said supporting-frame, and a suitable grinding-wheel secured thereto, of a longitudinally-disposed skid supported at its end above that portion of the frame opposite said shaft, and a carrier on said skid; a skid adjustable at one end upon which said carrier moves; and ball-bearings interposed between'said carrier and skid.

4. In a plate-glass-grooving machine, the combination with a suitable supporting-frame, a transverse shaft one end of which terminates between the sides of said supporting-frame, and a suitable grinding-wheel secured thereto of a longitudinally-disposed yielding skid su pported at its end above that portion of the frame opposite said shaft, and a carrier reciprocal longitudinally on said skid; a skid adjustable at one end upon which said carrier moves; and ball-bearings interposed between said carrier and skid.

5. In a plate-glass-grooving machine, the combination with a suitable supporting-frame, a transverse shaft one end of which terminates between the sides of said supporting-frame, and a suitable grinding-stone secured thereto, of a skid disposed longitudinally above that portion of the frame opposite said shaft and hinged at one end to said frame and having its opposite end adjustable vertically, and al ctrrier reciprocal longitudinally on said s 1 6. In a plate-glass-grooving machine, the combination with a suitable supporting-frame,

r a transverse shaft one end of which terminates between the sides of said supporting-frame and a suitable grinding-stone secured thereto, of a yielding skid disposed longitudinally above that portion of the frame opposite said shaft and hinged at one end to said frame and having its opposite end adjustable vertically, anda carrier reciprocal longitudinally on said ski 7. In a plate-glass-grooving machine, the combination with a suitablesupporting-frame, a transverse shaft one end of which terminates between the sides of said frame, and a suitable grinding-stone secured thereto, of a longitudinally-disposed skid supported at its ends above that portion of the frame opposite said grinding-stone, of a longitudinally-disposed skid, angle-iron tracks on said skid, a carrier, and ball-bearing runners secured to the under side of said carrier and engaging said track.

8. In a plate-glass-grooving machine, the combination with a suitable supporting-frame,

IIO

a transverse shaft one end of which terminates the under side of said carrier and engaging between the sides of said frame, and a suitable `said track. IO grinding-stone secured thereto, of a longitu- In testimony WhereofIhave hereunto set my dinally-disposed skid supported at its ends hand this 28th day of November, A. D. 1904. above that portion of the frame opposite said ALFRED WERTZLER. grindingstone, of a longitudinally-disposed Vitnesses:`

yielding skid, angle-iron tracks on said skid, FRANK D. THoMAsoN,

a carrier, and ball-bearing runners secured to I E. K. LUNDY. 

